509. Durgapur

Communist Party of India (Marxist) held the seat; the winning margin narrowed from 19.1% to 6.1%.

• Won on a lower shareIts own vote share fell 4.2% — it held because the rest of the vote was more divided.
• New challengerIndian National Congress (INC) finished second with 46.9% — it did not contest here in 1980.
• TurnoutTurnout rose 8.7% to 76.1%.

Written from the constituency figures by a fixed set of rules — no language model.